Iozone: Performance Test of File I/O Version $Revision: 3.483 $ Compiled for 64 bit mode. Build: linux-AMD64 Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins Al Slater, Scott Rhine, Mike Wisner, Ken Goss Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR, Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner, Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone, Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root, Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer, Vangel Bojaxhi, Ben England, Vikentsi Lapa, Alexey Skidanov, Sudhir Kumar. Run began: Mon Jul 14 12:24:05 2025 Auto Mode Machine = Linux oleg346-client.virtnet 4.18.0rh8.10-debug #2 SMP Mon Jul 14 01 Excel chart generation enabled Excel chart generation enabled Verify Mode. Pattern dbdbdbdb Performance measurements are invalid in this mode. Using maximum file size of 102400 kilobytes. Using Maximum Record Size 512 kB Command line used: iozone -a -M -R -V 0xab -g 100M -q 512k -i0 -i1 -f /mnt/lustre/d4.lustre-rsync-test/d0.iozone-oleg346-client.virtnet/iozone-file Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 64 4 9943 16994 275939 192730 64 8 9391 29453 492717 470274 64 16 8802 45352 633392 551422 64 32 15101 41159 653436 942521 64 64 12407 79212 1232453 1210227 128 4 11785 17171 230633 224556 128 8 13599 25641 805138 419822 128 16 16948 55942 776042 814915 128 32 17199 68602 907174 836500 128 64 21307 86608 776042 1057236 128 128 20833 102479 1319723 1852520 256 4 14348 19482 266119 284148 256 8 22759 34749 416210 393195 256 16 28104 56713 669913 477684 256 32 33477 74789 773140 731528 256 64 35477 83469 1128110 1197295 256 128 37647 126548 1881098 864661 256 256 36614 121963 1718521 1775350 512 4 15483 19589 256636 291587 512 8 25045 34846 505908 520879 512 16 36422 51858 687457 658978 512 32 50553 75216 1057974 898225 512 64 48251 100177 1105920 1019791 512 128 69386 117266 1036027 1264113 512 256 53624 140085 2347475 1667552 512 512 70669 119458 1635797 3104171 1024 4 15193 19246 278951 259768 1024 8 28075 31234 478931 497344 1024 16 35365 53158 552634 699870 1024 32 49380 77469 815323 863517 1024 64 62806 97125 1120288 1132697 1024 128 55813 112590 1216082 1151834 1024 256 65611 116975 1473500 1336827 1024 512 65368 144224 1468964 1374474 2048 4 18478 18766 254850 267926 2048 8 27398 31955 453802 407071 2048 16 35407 53884 737789 603954 2048 32 55826 75605 874488 870412 2048 64 63009 84058 1144133 1048728 2048 128 41301 110822 966485 1208181 2048 256 59115 107332 1563282 1324624 2048 512 86036 139528 1655793 1675821 4096 4 17933 20051 296144 291902 4096 8 29324 34988 505933 386961 4096 16 47488 52984 756695 464762 4096 32 57507 89397 1058929 960369 4096 64 69798 100480 1368498 1275246 4096 128 81194 109302 1372215 1211145 4096 256 89673 139847 1460773 1396532 4096 512 89618 126396 1731177 1742237 8192 4 17435 19549 281743 266675 8192 8 29812 32229 483961 415666 8192 16 43304 54690 735175 645498 8192 32 63079 74068 1126519 878590 8192 64 78196 110963 1333333 1117760 8192 128 87292 123308 1560401 1184499 8192 256 91905 132363 1548865 1437176 8192 512 93247 143638 1596582 1465996 16384 4 18408 18929 268313 280182 16384 8 29726 32465 472760 434233 16384 16 46025 56005 831001 750419 16384 32 66622 79417 1192346 978494 16384 64 86086 106899 1437321 1153150 16384 128 84835 127213 1522808 1338001 16384 256 102917 138135 1809797 1429547 16384 512 100485 143231 1994886 1692731 32768 4 17947 18745 313006 266238 32768 8 30347 32544 475174 440690 32768 16 45803 53095 694649 653010 32768 32 63860 79322 1020236 787161 32768 64 73921 96913 1387826 961617 32768 128 85636 113181 1543896 1329289 32768 256 89937 120161 1631791 1467834 32768 512 93773 133153 1863609 1524950 65536 4